Flashcards in 32. Orthodontics III Deck (51)
Conditions associated with supernumerary teeth ➡️ “Delayed eruption”
3. Cleidocranial dysostosis
4. Sturge weber syndrome / Encephalotrigeminal angiomatosis
Other term for Gardner’s
Familial colorectal polyposis
Supernumerary teeth = Impacted (Clinical exam: Few teeth present) ; with polyps in rectum
Ddx of garners
- with freckles
- # teeth
Peutz jeghers syndrome
(HEREDITARY INTESTINAL POLYPOSIS)
Portwine stains - follows CN V!!
Sturge weber (encephaloTRIGEMINAL angiomatosis)
BQ: What is the most common supernumerary teeth?
BQ: What stage of tooth development does supernumerary occur?
BQ: How many teeth are present in the radiograph of a newly born child?
(20 deciduous/4 perm 6s)
Stage of tooth dev: determines # of teeth; (Supernumerary)
Stage of tooth dev: morphodifferentiation
Stage of tooth dev: Appositional stage (-deposition of enamel and dentin)
Stage of tooth dev: Histodifferentiation
Enamel organ gives rise to:
Dental papilla gives rise to:
Dental SAC / FOLLICLE gives rise to:
Ameloblasts are derived from?
Inner enamel epithelium
Cells that line dental pulp
Which is first to form: Ameloblasts or Odontoblasts?
Ameloblasts ➡️ Odontoblasts
(*remember A is first in the alphabet)
Which is first to form: Dentin or Enamel?
Dentin ➡️ Enamel
( First in the alphabet)
BQ: OEE + IEE =
REE (reduced enamel epithelium)
BQ: Initial membrane / barrier of enamel
(Ree but in erupted tooth already)
Nasmyth’s membrane or Primary enamel cuticle
BQ: Oee + IEE in the “cervical area” forms:
Cervical loop gives rise to:
Responsible for ROOT development
✅ Shape and # of roots
HERS gives rise to:
Responsible for shape and # of APEX
Remnant of HERS
Epithelial rest of malassez
Can enamel regenerate? Dentin? Cementum?
Enamel - cannot!!! (Far from pulp = no blood supply)
Dentin and Cementum ✅
BQ: what is the Indication for serial extraction???
Answer sa boards: 8mm